]> source.dussan.org Git - nextcloud-server.git/commitdiff
backport trashbin: enable trashbin to handle encryption keys
authorBjörn Schießle <schiessle@owncloud.com>
Fri, 24 May 2013 11:04:31 +0000 (13:04 +0200)
committerBjörn Schießle <schiessle@owncloud.com>
Fri, 24 May 2013 11:04:31 +0000 (13:04 +0200)
apps/files_trashbin/appinfo/app.php
apps/files_trashbin/lib/trash.php

index e83d3b8fbbd766ccadf600b766452bec191e3a16..2c101f0a723b18cbb0890d9271c51b712719a62a 100644 (file)
@@ -3,7 +3,5 @@
 OC::$CLASSPATH['OCA\Files_Trashbin\Hooks'] = 'files_trashbin/lib/hooks.php';
 OC::$CLASSPATH['OCA\Files_Trashbin\Trashbin'] = 'files_trashbin/lib/trash.php';
 
-//Listen to delete file signal
-OCP\Util::connectHook('OC_Filesystem', 'delete', "OCA\Files_Trashbin\Hooks", "remove_hook");
-//Listen to delete user signal
-OCP\Util::connectHook('OC_User', 'pre_deleteUser', "OCA\Files_Trashbin\Hooks", "deleteUser_hook");
\ No newline at end of file
+// register hooks
+\OCA\Files_Trashbin\Trashbin::registerHooks();
index c1837e0deeeefc4476251a1e4d820d42071c7059..45f5adfd6d0df6dab3cc738da6b2daffc748b746 100644 (file)
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * ownCloud - trash bin
  *
@@ -24,10 +25,22 @@ namespace OCA\Files_Trashbin;
 
 class Trashbin {
        // how long do we keep files in the trash bin if no other value is defined in the config file (unit: days)
-       const DEFAULT_RETENTION_OBLIGATION=180;
+
+       const DEFAULT_RETENTION_OBLIGATION = 180;
 
        // unit: percentage; 50% of available disk space/quota
-       const DEFAULTMAXSIZE=50;
+       const DEFAULTMAXSIZE = 50;
+
+       public static function getUidAndFilename($filename) {
+               $uid = \OC\Files\Filesystem::getOwner($filename);
+               \OC\Files\Filesystem::initMountPoints($uid);
+               if ($uid != \OCP\User::getUser()) {
+                       $info = \OC\Files\Filesystem::getFileInfo($filename);
+                       $ownerView = new \OC\Files\View('/' . $uid . '/files');
+                       $filename = $ownerView->getPath($info['fileid']);
+               }
+               return array($uid, $filename);
+       }
 
        /**
         * move file to the trash bin
@@ -36,7 +49,7 @@ class Trashbin {
         */
        public static function move2trash($file_path) {
                $user = \OCP\User::getUser();
-               $view = new \OC\Files\View('/'. $user);
+               $view = new \OC\Files\View('/' . $user);
                if (!$view->is_dir('files_trashbin')) {
                        $view->mkdir('files_trashbin');
                        $view->mkdir("files_trashbin/files");
@@ -46,257 +59,511 @@ class Trashbin {
 
                $path_parts = pathinfo($file_path);
 
-               $deleted = $path_parts['basename'];
+               $filename = $path_parts['basename'];
                $location = $path_parts['dirname'];
                $timestamp = time();
-               $mime = $view->getMimeType('files'.$file_path);
+               $mime = $view->getMimeType('files' . $file_path);
 
-               if ( $view->is_dir('files'.$file_path) ) {
+               if ($view->is_dir('files' . $file_path)) {
                        $type = 'dir';
                } else {
                        $type = 'file';
                }
-               
+
                $trashbinSize = self::getTrashbinSize($user);
-               if ( $trashbinSize === false || $trashbinSize < 0 ) {
-                       $trashbinSize = self::calculateSize(new \OC\Files\View('/'. $user.'/files_trashbin'));
+               if ($trashbinSize === false || $trashbinSize < 0) {
+                       $trashbinSize = self::calculateSize(new \OC\Files\View('/' . $user . '/files_trashbin'));
                }
-               
-               $sizeOfAddedFiles = self::copy_recursive($file_path, 'files_trashbin/files/'.$deleted.'.d'.$timestamp, $view);
-               
-               if ( $view->file_exists('files_trashbin/files/'.$deleted.'.d'.$timestamp) ) {
+
+               // disable proxy to prevent recursive calls
+               $proxyStatus = \OC_FileProxy::$enabled;
+               \OC_FileProxy::$enabled = false;
+               $sizeOfAddedFiles = self::copy_recursive($file_path, 'files_trashbin/files/' . $filename . '.d' . $timestamp, $view);
+               \OC_FileProxy::$enabled = $proxyStatus;
+
+               if ($view->file_exists('files_trashbin/files/' . $filename . '.d' . $timestamp)) {
                        $trashbinSize += $sizeOfAddedFiles;
                        $query = \OC_DB::prepare("INSERT INTO `*PREFIX*files_trash` (`id`,`timestamp`,`location`,`type`,`mime`,`user`) VALUES (?,?,?,?,?,?)");
-                       $result = $query->execute(array($deleted, $timestamp, $location, $type, $mime, $user));
-                       if ( !$result ) { // if file couldn't be added to the database than also don't store it in the trash bin.
-                               $view->deleteAll('files_trashbin/files/'.$deleted.'.d'.$timestamp);
+                       $result = $query->execute(array($filename, $timestamp, $location, $type, $mime, $user));
+                       if (!$result) { // if file couldn't be added to the database than also don't store it in the trash bin.
+                               $view->deleteAll('files_trashbin/files/' . $filename . '.d' . $timestamp);
                                \OC_Log::write('files_trashbin', 'trash bin database couldn\'t be updated', \OC_log::ERROR);
                                return;
                        }
-                       \OCP\Util::emitHook('\OCA\Files_Trashbin\Trashbin', 'post_moveToTrash',
-                                       array('filePath' => \OC\Files\Filesystem::normalizePath($file_path),
-                                                       'trashPath' => \OC\Files\Filesystem::normalizePath($deleted.'.d'.$timestamp)));
-                       
-                       // Take care of file versions
-                       if ( \OCP\App::isEnabled('files_versions') ) {
-                               if ( $view->is_dir('files_versions/'.$file_path) ) {
-                                       $trashbinSize += self::calculateSize(new \OC\Files\View('/'. $user.'/files_versions/'.$file_path));
-                                       $view->rename('files_versions/'.$file_path, 'files_trashbin/versions'. $deleted.'.d'.$timestamp);
-                               } else if ( $versions = \OCA\Files_Versions\Storage::getVersions($user, $file_path) ) {
-                                       foreach ($versions as $v) {
-                                               $trashbinSize += $view->filesize('files_versions'.$v['path'].'.v'.$v['version']);
-                                               $view->rename('files_versions'.$v['path'].'.v'.$v['version'], 'files_trashbin/versions/'. $deleted.'.v'.$v['version'].'.d'.$timestamp);
-                                       }
-                               }
-                       }
-                       
-                       // Take care of encryption keys
-                       $keyfile = \OC\Files\Filesystem::normalizePath('files_encryption/keyfiles/'.$file_path);
-                       if ( \OCP\App::isEnabled('files_encryption') && $view->file_exists($keyfile.'.key') ) {
-                               if ( $view->is_dir('files'.$file_path) ) {
-                                       $trashbinSize += self::calculateSize(new \OC\Files\View('/'.$user.'/'.$keyfile));
-                                       $view->rename($keyfile, 'files_trashbin/keyfiles/'. $deleted.'.d'.$timestamp);
-                               } else {
-                                       $trashbinSize += $view->filesize($keyfile.'.key');
-                                       $view->rename($keyfile.'.key', 'files_trashbin/keyfiles/'. $deleted.'.key.d'.$timestamp);
-                               }
-                       }
+                       \OCP\Util::emitHook('\OCA\Files_Trashbin\Trashbin', 'post_moveToTrash', array('filePath' => \OC\Files\Filesystem::normalizePath($file_path),
+                               'trashPath' => \OC\Files\Filesystem::normalizePath($filename . '.d' . $timestamp)));
+
+                       $trashbinSize += self::retainVersions($view, $file_path, $filename, $timestamp);
+                       $trashbinSize += self::retainEncryptionKeys($view, $file_path, $filename, $timestamp);
                } else {
-                       \OC_Log::write('files_trashbin', 'Couldn\'t move '.$file_path.' to the trash bin', \OC_log::ERROR);
+                       \OC_Log::write('files_trashbin', 'Couldn\'t move ' . $file_path . ' to the trash bin', \OC_log::ERROR);
                }
 
                $trashbinSize -= self::expire($trashbinSize);
-               
+
                self::setTrashbinSize($user, $trashbinSize);
+       }
+
+       /**
+        * Move file versions to trash so that they can be restored later
+        *
+        * @param \OC\Files\View $view
+        * @param $file_path path to original file
+        * @param $filename of deleted file
+        * @param $timestamp when the file was deleted
+        *
+        * @return size of stored versions
+        */
+       private static function retainVersions($view, $file_path, $filename, $timestamp) {
+               $size = 0;
+               if (\OCP\App::isEnabled('files_versions')) {
+
+                       // disable proxy to prevent recursive calls
+                       $proxyStatus = \OC_FileProxy::$enabled;
+                       \OC_FileProxy::$enabled = false;
+
+                       $user = \OCP\User::getUser();
+                       $rootView = new \OC\Files\View('/');
 
+                       list($owner, $ownerPath) = self::getUidAndFilename($file_path);
+
+                       if ($rootView->is_dir($owner . '/files_versions/' . $ownerPath)) {
+                               $size += self::calculateSize(new \OC\Files\View('/' . $owner . '/files_versions/' . $ownerPath));
+                               $rootView->rename($owner . '/files_versions/' . $ownerPath, $user . '/files_trashbin/versions/' . $filename . '.d' . $timestamp);
+                       } else if ($versions = \OCA\Files_Versions\Storage::getVersions($owner, $ownerPath)) {
+                               foreach ($versions as $v) {
+                                       $size += $rootView->filesize($owner . '/files_versions' . $v['path'] . '.v' . $v['version']);
+                                       $rootView->rename($owner . '/files_versions' . $v['path'] . '.v' . $v['version'], $user . '/files_trashbin/versions/' . $filename . '.v' . $v['version'] . '.d' . $timestamp);
+                               }
+                       }
+
+                       // enable proxy
+                       \OC_FileProxy::$enabled = $proxyStatus;
+               }
+
+               return $size;
        }
 
+       /**
+        * Move encryption keys to trash so that they can be restored later
+        *
+        * @param \OC\Files\View $view
+        * @param $file_path path to original file
+        * @param $filename of deleted file
+        * @param $timestamp when the file was deleted
+        *
+        * @return size of encryption keys
+        */
+       private static function retainEncryptionKeys($view, $file_path, $filename, $timestamp) {
+               $size = 0;
+
+               if (\OCP\App::isEnabled('files_encryption')) {
+
+                       $user = \OCP\User::getUser();
+                       $rootView = new \OC\Files\View('/');
+
+                       list($owner, $ownerPath) = self::getUidAndFilename($file_path);
+
+
+                       // disable proxy to prevent recursive calls
+                       $proxyStatus = \OC_FileProxy::$enabled;
+                       \OC_FileProxy::$enabled = false;
+
+                       // retain key files
+                       $keyfile = \OC\Files\Filesystem::normalizePath($owner . '/files_encryption/keyfiles/' . $ownerPath);
+
+                       if ($rootView->is_dir($keyfile) || $rootView->file_exists($keyfile . '.key')) {
+                               // move keyfiles
+                               if ($rootView->is_dir($keyfile)) {
+                                       $size += self::calculateSize(new \OC\Files\View($keyfile));
+                                       $rootView->rename($keyfile, $user . '/files_trashbin/keyfiles/' . $filename . '.d' . $timestamp);
+                               } else {
+                                       $size += $rootView->filesize($keyfile . '.key');
+                                       $rootView->rename($keyfile . '.key', $user . '/files_trashbin/keyfiles/' . $filename . '.key.d' . $timestamp);
+                               }
+                       }
+
+                       // retain share keys
+                       $sharekeys = \OC\Files\Filesystem::normalizePath($owner . '/files_encryption/share-keys/' . $ownerPath);
+
+                       if ($rootView->is_dir($sharekeys)) {
+                               $size += self::calculateSize(new \OC\Files\View($sharekeys));
+                               $rootView->rename($sharekeys, $user . '/files_trashbin/share-keys/' . $filename . '.d' . $timestamp);
+                       } else {
+                               // get local path to share-keys
+                               $localShareKeysPath = $rootView->getLocalFile($sharekeys);
+
+                               // handle share-keys
+                               $matches = glob(preg_quote($localShareKeysPath) . '*.shareKey');
+                               foreach ($matches as $src) {
+                                       // get source file parts
+                                       $pathinfo = pathinfo($src);
+
+                                       // we only want to keep the owners key so we can access the private key
+                                       $ownerShareKey = $filename . '.' . $user . '.shareKey';
+
+                                       // if we found the share-key for the owner, we need to move it to files_trashbin
+                                       if ($pathinfo['basename'] == $ownerShareKey) {
+
+                                               // calculate size
+                                               $size += $rootView->filesize($sharekeys . '.' . $user . '.shareKey');
+
+                                               // move file
+                                               $rootView->rename($sharekeys . '.' . $user . '.shareKey', $user . '/files_trashbin/share-keys/' . $ownerShareKey . '.d' . $timestamp);
+                                       } else {
+
+                                               // calculate size
+                                               $size += filesize($src);
+
+                                               // don't keep other share-keys
+                                               unlink($src);
+                                       }
+                               }
+                       }
+
+                       // enable proxy
+                       \OC_FileProxy::$enabled = $proxyStatus;
+               }
+               return $size;
+       }
 
        /**
         * restore files from trash bin
         * @param $file path to the deleted file
         * @param $filename name of the file
         * @param $timestamp time when the file was deleted
+        *
+        * @return bool
         */
        public static function restore($file, $filename, $timestamp) {
                $user = \OCP\User::getUser();
-               $view = new \OC\Files\View('/'.$user);
-               
+               $view = new \OC\Files\View('/' . $user);
+
                $trashbinSize = self::getTrashbinSize($user);
-               if ( $trashbinSize === false || $trashbinSize < 0 ) {
-                       $trashbinSize = self::calculateSize(new \OC\Files\View('/'. $user.'/files_trashbin'));
+               if ($trashbinSize === false || $trashbinSize < 0) {
+                       $trashbinSize = self::calculateSize(new \OC\Files\View('/' . $user . '/files_trashbin'));
                }
-               if ( $timestamp ) {
+               if ($timestamp) {
                        $query = \OC_DB::prepare('SELECT `location`,`type` FROM `*PREFIX*files_trash`'
-                               .' WHERE `user`=? AND `id`=? AND `timestamp`=?');
-                       $result = $query->execute(array($user,$filename,$timestamp))->fetchAll();
-                       if ( count($result) != 1 ) {
+                                       . ' WHERE `user`=? AND `id`=? AND `timestamp`=?');
+                       $result = $query->execute(array($user, $filename, $timestamp))->fetchAll();
+                       if (count($result) != 1) {
                                \OC_Log::write('files_trashbin', 'trash bin database inconsistent!', \OC_Log::ERROR);
                                return false;
                        }
 
                        // if location no longer exists, restore file in the root directory
                        $location = $result[0]['location'];
-                       if ( $result[0]['location'] != '/' &&
-                               (!$view->is_dir('files'.$result[0]['location']) ||
-                                !$view->isUpdatable('files'.$result[0]['location'])) ) {
+                       if ($result[0]['location'] != '/' &&
+                               (!$view->is_dir('files' . $result[0]['location']) ||
+                               !$view->isUpdatable('files' . $result[0]['location']))) {
                                $location = '';
                        }
                } else {
                        $path_parts = pathinfo($file);
                        $result[] = array(
-                                       'location' => $path_parts['dirname'],
-                                       'type' => $view->is_dir('/files_trashbin/files/'.$file) ? 'dir' : 'files',
-                                       );
+                               'location' => $path_parts['dirname'],
+                               'type' => $view->is_dir('/files_trashbin/files/' . $file) ? 'dir' : 'files',
+                       );
                        $location = '';
                }
-               
-               $source = \OC\Files\Filesystem::normalizePath('files_trashbin/files/'.$file);
-               $target = \OC\Files\Filesystem::normalizePath('files/'.$location.'/'.$filename);
+
+               $source = \OC\Files\Filesystem::normalizePath('files_trashbin/files/' . $file);
+               $target = \OC\Files\Filesystem::normalizePath('files/' . $location . '/' . $filename);
 
                // we need a  extension in case a file/dir with the same name already exists
                $ext = self::getUniqueExtension($location, $filename, $view);
                $mtime = $view->filemtime($source);
-               if( $view->rename($source, $target.$ext) ) {
+
+               // disable proxy to prevent recursive calls
+               $proxyStatus = \OC_FileProxy::$enabled;
+               \OC_FileProxy::$enabled = false;
+
+               // restore file
+               $restoreResult = $view->rename($source, $target . $ext);
+
+               // handle the restore result
+               if ($restoreResult) {
                        $fakeRoot = $view->getRoot();
-                       $view->chroot('/'.$user.'/files');
-                       $view->touch('/'.$location.'/'.$filename.$ext, $mtime);
+                       $view->chroot('/' . $user . '/files');
+                       $view->touch('/' . $location . '/' . $filename . $ext, $mtime);
                        $view->chroot($fakeRoot);
-                       \OCP\Util::emitHook('\OCA\Files_Trashbin\Trashbin', 'post_restore', 
-                                       array('filePath' => \OC\Files\Filesystem::normalizePath('/'.$location.'/'.$filename.$ext),
-                                                       'trashPath' => \OC\Files\Filesystem::normalizePath($file)));
-                       if ($view->is_dir($target.$ext)) {
-                               $trashbinSize -= self::calculateSize(new \OC\Files\View('/'.$user.'/'.$target.$ext));
+                       \OCP\Util::emitHook('\OCA\Files_Trashbin\Trashbin', 'post_restore', array('filePath' => \OC\Files\Filesystem::normalizePath('/' . $location . '/' . $filename . $ext),
+                               'trashPath' => \OC\Files\Filesystem::normalizePath($file)));
+                       if ($view->is_dir($target . $ext)) {
+                               $trashbinSize -= self::calculateSize(new \OC\Files\View('/' . $user . '/' . $target . $ext));
                        } else {
-                               $trashbinSize -= $view->filesize($target.$ext);
+                               $trashbinSize -= $view->filesize($target . $ext);
                        }
-                       // if versioning app is enabled, copy versions from the trash bin back to the original location
-                       if ( \OCP\App::isEnabled('files_versions') ) {
-                               if ($timestamp ) {
-                                       $versionedFile = $filename;
-                               } else {
-                                       $versionedFile = $file;
-                               }
-                               if ( $result[0]['type'] === 'dir' ) {
-                                       $trashbinSize -= self::calculateSize(new \OC\Files\View('/'.$user.'/'.'files_trashbin/versions/'. $file));
-                                       $view->rename(\OC\Files\Filesystem::normalizePath('files_trashbin/versions/'. $file), \OC\Files\Filesystem::normalizePath('files_versions/'.$location.'/'.$filename.$ext));
-                               } else if ( $versions = self::getVersionsFromTrash($versionedFile, $timestamp) ) {
-                                       foreach ($versions as $v) {
-                                               if ($timestamp ) {
-                                                       $trashbinSize -= $view->filesize('files_trashbin/versions/'.$versionedFile.'.v'.$v.'.d'.$timestamp);
-                                                       $view->rename('files_trashbin/versions/'.$versionedFile.'.v'.$v.'.d'.$timestamp, 'files_versions/'.$location.'/'.$filename.$ext.'.v'.$v);
-                                               } else {
-                                                       $trashbinSize -= $view->filesize('files_trashbin/versions/'.$versionedFile.'.v'.$v);
-                                                       $view->rename('files_trashbin/versions/'.$versionedFile.'.v'.$v, 'files_versions/'.$location.'/'.$filename.$ext.'.v'.$v);
-                                               }
+
+                       $trashbinSize -= self::restoreVersions($view, $file, $filename, $ext, $location, $timestamp);
+                       $trashbinSize -= self::restoreEncryptionKeys($view, $file, $filename, $ext, $location, $timestamp);
+
+                       if ($timestamp) {
+                               $query = \OC_DB::prepare('DELETE FROM `*PREFIX*files_trash` WHERE `user`=? AND `id`=? AND `timestamp`=?');
+                               $query->execute(array($user, $filename, $timestamp));
+                       }
+
+                       self::setTrashbinSize($user, $trashbinSize);
+
+                       // enable proxy
+                       \OC_FileProxy::$enabled = $proxyStatus;
+
+                       return true;
+               }
+
+               return false;
+       }
+
+       /**
+        * @brief restore versions from trash bin
+        *
+        * @param \OC\Files\View $view file view
+        * @param $file complete path to file
+        * @param $filename name of file
+        * @param $ext file extension in case a file with the same $filename already exists
+        * @param $location location if file
+        * @param $timestamp deleteion time
+        *
+        * @return size of restored versions
+        */
+       private static function restoreVersions($view, $file, $filename, $ext, $location, $timestamp) {
+               $size = 0;
+               if (\OCP\App::isEnabled('files_versions')) {
+                       // disable proxy to prevent recursive calls
+                       $proxyStatus = \OC_FileProxy::$enabled;
+                       \OC_FileProxy::$enabled = false;
+
+                       $user = \OCP\User::getUser();
+                       $rootView = new \OC\Files\View('/');
+
+                       $target = \OC\Files\Filesystem::normalizePath('/' . $location . '/' . $filename . $ext);
+
+                       list($owner, $ownerPath) = self::getUidAndFilename($target);
+
+                       if ($timestamp) {
+                               $versionedFile = $filename;
+                       } else {
+                               $versionedFile = $file;
+                       }
+
+                       if ($view->is_dir('/files_trashbin/versions/' . $file)) {
+                               $size += self::calculateSize(new \OC\Files\View('/' . $user . '/' . 'files_trashbin/versions/' . $file));
+                               $rootView->rename(\OC\Files\Filesystem::normalizePath($user . '/files_trashbin/versions/' . $file), \OC\Files\Filesystem::normalizePath($owner . '/files_versions/' . $ownerPath));
+                       } else if ($versions = self::getVersionsFromTrash($versionedFile, $timestamp)) {
+                               foreach ($versions as $v) {
+                                       if ($timestamp) {
+                                               $size += $view->filesize('files_trashbin/versions/' . $versionedFile . '.v' . $v . '.d' . $timestamp);
+                                               $rootView->rename($user . '/files_trashbin/versions/' . $versionedFile . '.v' . $v . '.d' . $timestamp, $owner . '/files_versions/' . $ownerPath . '.v' . $v);
+                                       } else {
+                                               $size += $view->filesize('files_trashbin/versions/' . $versionedFile . '.v' . $v);
+                                               $rootView->rename($user . '/files_trashbin/versions/' . $versionedFile . '.v' . $v, $owner . '/files_versions/' . $ownerPath . '.v' . $v);
                                        }
                                }
                        }
-                       
-                       // Take care of encryption keys TODO! Get '.key' in file between file name and delete date (also for permanent delete!)
-                       $parts = pathinfo($file);
-                       if ( $result[0]['type'] === 'dir' ) {
-                               $keyfile = \OC\Files\Filesystem::normalizePath('files_trashbin/keyfiles/'.$parts['dirname'].'/'.$filename);
+
+                       // enable proxy
+                       \OC_FileProxy::$enabled = $proxyStatus;
+               }
+               return $size;
+       }
+
+       /**
+        * @brief restore encryption keys from trash bin
+        *
+        * @param \OC\Files\View $view
+        * @param $file complete path to file
+        * @param $filename name of file
+        * @param $ext file extension in case a file with the same $filename already exists
+        * @param $location location of file
+        * @param $timestamp deleteion time
+        *
+        * @return size of restored encrypted file
+        */
+       private static function restoreEncryptionKeys($view, $file, $filename, $ext, $location, $timestamp) {
+               // Take care of encryption keys TODO! Get '.key' in file between file name and delete date (also for permanent delete!)
+               $size = 0;
+               if (\OCP\App::isEnabled('files_encryption')) {
+                       $user = \OCP\User::getUser();
+                       $rootView = new \OC\Files\View('/');
+
+                       $target = \OC\Files\Filesystem::normalizePath('/' . $location . '/' . $filename . $ext);
+
+                       list($owner, $ownerPath) = self::getUidAndFilename($target);
+
+                       $path_parts = pathinfo($file);
+                       $source_location = $path_parts['dirname'];
+
+                       if ($view->is_dir('/files_trashbin/keyfiles/' . $file)) {
+                               if ($source_location != '.') {
+                                       $keyfile = \OC\Files\Filesystem::normalizePath($user . '/files_trashbin/keyfiles/' . $source_location . '/' . $filename);
+                                       $sharekey = \OC\Files\Filesystem::normalizePath($user . '/files_trashbin/share-keys/' . $source_location . '/' . $filename);
+                               } else {
+                                       $keyfile = \OC\Files\Filesystem::normalizePath($user . '/files_trashbin/keyfiles/' . $filename);
+                                       $sharekey = \OC\Files\Filesystem::normalizePath($user . '/files_trashbin/share-keys/' . $filename);
+                               }
                        } else {
-                               $keyfile = \OC\Files\Filesystem::normalizePath('files_trashbin/keyfiles/'.$parts['dirname'].'/'.$filename.'.key');
+                               $keyfile = \OC\Files\Filesystem::normalizePath($user . '/files_trashbin/keyfiles/' . $source_location . '/' . $filename . '.key');
                        }
+
                        if ($timestamp) {
-                               $keyfile .= '.d'.$timestamp;
+                               $keyfile .= '.d' . $timestamp;
                        }
-                       if ( \OCP\App::isEnabled('files_encryption') && $view->file_exists($keyfile) ) {
-                               if ( $result[0]['type'] === 'dir' ) {
-                                       $trashbinSize -= self::calculateSize(new \OC\Files\View('/'.$user.'/'.$keyfile));
-                                       $view->rename($keyfile, 'files_encryption/keyfiles/'. $location.'/'.$filename);
+
+                       // disable proxy to prevent recursive calls
+                       $proxyStatus = \OC_FileProxy::$enabled;
+                       \OC_FileProxy::$enabled = false;
+
+                       if ($rootView->file_exists($keyfile)) {
+                               // handle directory
+                               if ($rootView->is_dir($keyfile)) {
+
+                                       // handle keyfiles
+                                       $size += self::calculateSize(new \OC\Files\View($keyfile));
+                                       $rootView->rename($keyfile, $owner . '/files_encryption/keyfiles/' . $ownerPath);
+
+                                       // handle share-keys
+                                       if ($timestamp) {
+                                               $sharekey .= '.d' . $timestamp;
+                                       }
+                                       $size += self::calculateSize(new \OC\Files\View($sharekey));
+                                       $rootView->rename($sharekey, $owner . '/files_encryption/share-keys/' . $ownerPath);
                                } else {
-                                       $trashbinSize -= $view->filesize($keyfile);
-                                       $view->rename($keyfile, 'files_encryption/keyfiles/'. $location.'/'.$filename.'.key');
+                                       // handle keyfiles
+                                       $size += $rootView->filesize($keyfile);
+                                       $rootView->rename($keyfile, $owner . '/files_encryption/keyfiles/' . $ownerPath . '.key');
+
+                                       // handle share-keys
+                                       $ownerShareKey = \OC\Files\Filesystem::normalizePath($user . '/files_trashbin/share-keys/' . $source_location . '/' . $filename . '.' . $user . '.shareKey');
+                                       if ($timestamp) {
+                                               $ownerShareKey .= '.d' . $timestamp;
+                                       }
+
+                                       $size += $rootView->filesize($ownerShareKey);
+
+                                       // move only owners key
+                                       $rootView->rename($ownerShareKey, $owner . '/files_encryption/share-keys/' . $ownerPath . '.' . $user . '.shareKey');
+
+                                       // try to re-share if file is shared
+                                       $filesystemView = new \OC_FilesystemView('/');
+                                       $session = new \OCA\Encryption\Session($filesystemView);
+                                       $util = new \OCA\Encryption\Util($filesystemView, $user);
+
+                                       // fix the file size
+                                       $absolutePath = \OC\Files\Filesystem::normalizePath('/' . $owner . '/files/' . $ownerPath);
+                                       $util->fixFileSize($absolutePath);
+
+                                       // get current sharing state
+                                       $sharingEnabled = \OCP\Share::isEnabled();
+
+                                       // get the final filename
+                                       $target = \OC\Files\Filesystem::normalizePath($location . '/' . $filename);
+
+                                       // get users sharing this file
+                                       $usersSharing = $util->getSharingUsersArray($sharingEnabled, $target . $ext, $user);
+
+                                       // Attempt to set shareKey
+                                       $util->setSharedFileKeyfiles($session, $usersSharing, $target . $ext);
                                }
                        }
-                       
-                       if ( $timestamp ) {
-                               $query = \OC_DB::prepare('DELETE FROM `*PREFIX*files_trash` WHERE `user`=? AND `id`=? AND `timestamp`=?');
-                               $query->execute(array($user,$filename,$timestamp));
-                       }
 
-                       self::setTrashbinSize($user, $trashbinSize);
-                       
-                       return true;
-               } else {
-                       \OC_Log::write('files_trashbin', 'Couldn\'t restore file from trash bin, '.$filename, \OC_log::ERROR);
+                       // enable proxy
+                       \OC_FileProxy::$enabled = $proxyStatus;
                }
-
-               return false;
+               return $size;
        }
 
        /**
-        * delete file from trash bin permanently
+        * @brief delete file from trash bin permanently
         * @param $filename path to the file
         * @param $timestamp of deletion time
         * @return size of deleted files
         */
-       public static function delete($filename, $timestamp=null) {
+       public static function delete($filename, $timestamp = null) {
                $user = \OCP\User::getUser();
-               $view = new \OC\Files\View('/'.$user);
+               $view = new \OC\Files\View('/' . $user);
                $size = 0;
-       
+
                $trashbinSize = self::getTrashbinSize($user);
-               if ( $trashbinSize === false || $trashbinSize < 0 ) {
-                       $trashbinSize = self::calculateSize(new \OC\Files\View('/'. $user.'/files_trashbin'));
+               if ($trashbinSize === false || $trashbinSize < 0) {
+                       $trashbinSize = self::calculateSize(new \OC\Files\View('/' . $user . '/files_trashbin'));
                }
 
-               if ( $timestamp ) {
+               if ($timestamp) {
                        $query = \OC_DB::prepare('DELETE FROM `*PREFIX*files_trash` WHERE `user`=? AND `id`=? AND `timestamp`=?');
-                       $query->execute(array($user,$filename,$timestamp));
-                       $file = $filename.'.d'.$timestamp;
+                       $query->execute(array($user, $filename, $timestamp));
+                       $file = $filename . '.d' . $timestamp;
                } else {
                        $file = $filename;
                }
 
-               if ( \OCP\App::isEnabled('files_versions') ) {
-                       if ($view->is_dir('files_trashbin/versions/'.$file)) {
-                               $size += self::calculateSize(new \OC\Files\view('/'.$user.'/files_trashbin/versions/'.$file));
-                               $view->unlink('files_trashbin/versions/'.$file);
-                       } else if ( $versions = self::getVersionsFromTrash($filename, $timestamp) ) {
+               $size += self::deleteVersions($view, $file, $filename, $timestamp);
+               $size += self::deleteEncryptionKeys($view, $file, $filename, $timestamp);
+
+               if ($view->is_dir('/files_trashbin/files/' . $file)) {
+                       $size += self::calculateSize(new \OC\Files\View('/' . $user . '/files_trashbin/files/' . $file));
+               } else {
+                       $size += $view->filesize('/files_trashbin/files/' . $file);
+               }
+               $view->unlink('/files_trashbin/files/' . $file);
+               $trashbinSize -= $size;
+               self::setTrashbinSize($user, $trashbinSize);
+
+               return $size;
+       }
+
+       private static function deleteVersions($view, $file, $filename, $timestamp) {
+               $size = 0;
+               if (\OCP\App::isEnabled('files_versions')) {
+                       $user = \OCP\User::getUser();
+                       if ($view->is_dir('files_trashbin/versions/' . $file)) {
+                               $size += self::calculateSize(new \OC\Files\view('/' . $user . '/files_trashbin/versions/' . $file));
+                               $view->unlink('files_trashbin/versions/' . $file);
+                       } else if ($versions = self::getVersionsFromTrash($filename, $timestamp)) {
                                foreach ($versions as $v) {
-                                       if ($timestamp ) {
-                                               $size += $view->filesize('/files_trashbin/versions/'.$filename.'.v'.$v.'.d'.$timestamp);
-                                               $view->unlink('/files_trashbin/versions/'.$filename.'.v'.$v.'.d'.$timestamp);
+                                       if ($timestamp) {
+                                               $size += $view->filesize('/files_trashbin/versions/' . $filename . '.v' . $v . '.d' . $timestamp);
+                                               $view->unlink('/files_trashbin/versions/' . $filename . '.v' . $v . '.d' . $timestamp);
                                        } else {
-                                               $size += $view->filesize('/files_trashbin/versions/'.$filename.'.v'.$v);
-                                               $view->unlink('/files_trashbin/versions/'.$filename.'.v'.$v);
+                                               $size += $view->filesize('/files_trashbin/versions/' . $filename . '.v' . $v);
+                                               $view->unlink('/files_trashbin/versions/' . $filename . '.v' . $v);
                                        }
                                }
                        }
                }
-               
-               // Take care of encryption keys
-               $parts = pathinfo($file);
-               if ( $view->is_dir('/files_trashbin/files/'.$file) ) {
-                       $keyfile = \OC\Files\Filesystem::normalizePath('files_trashbin/keyfiles/'.$filename);
-               } else {
-                       $keyfile = \OC\Files\Filesystem::normalizePath('files_trashbin/keyfiles/'.$filename.'.key');
-               }
-               if ($timestamp) {
-                       $keyfile .= '.d'.$timestamp;
-               }
-               if ( \OCP\App::isEnabled('files_encryption') && $view->file_exists($keyfile) ) {
-                       if ( $view->is_dir($keyfile) ) {
-                               $size += self::calculateSize(new \OC\Files\View('/'.$user.'/'.$keyfile));
+
+               return $size;
+       }
+
+       private static function deleteEncryptionKeys($view, $file, $filename, $timestamp) {
+               $size = 0;
+               if (\OCP\App::isEnabled('files_encryption')) {
+                       $user = \OCP\User::getUser();
+
+                       if ($view->is_dir('/files_trashbin/files/' . $file)) {
+                               $keyfile = \OC\Files\Filesystem::normalizePath('files_trashbin/keyfiles/' . $filename);
+                               $sharekeys = \OC\Files\Filesystem::normalizePath('files_trashbin/share-keys/' . $filename);
                        } else {
-                               $size += $view->filesize($keyfile);
+                               $keyfile = \OC\Files\Filesystem::normalizePath('files_trashbin/keyfiles/' . $filename . '.key');
+                               $sharekeys = \OC\Files\Filesystem::normalizePath('files_trashbin/share-keys/' . $filename . '.' . $user . '.shareKey');
+                       }
+                       if ($timestamp) {
+                               $keyfile .= '.d' . $timestamp;
+                               $sharekeys .= '.d' . $timestamp;
+                       }
+                       if ($view->file_exists($keyfile)) {
+                               if ($view->is_dir($keyfile)) {
+                                       $size += self::calculateSize(new \OC\Files\View('/' . $user . '/' . $keyfile));
+                                       $size += self::calculateSize(new \OC\Files\View('/' . $user . '/' . $sharekeys));
+                               } else {
+                                       $size += $view->filesize($keyfile);
+                                       $size += $view->filesize($sharekeys);
+                               }
+                               $view->unlink($keyfile);
+                               $view->unlink($sharekeys);
                        }
-                       $view->unlink($keyfile);
-               }
-       
-               if ($view->is_dir('/files_trashbin/files/'.$file)) {
-                       $size += self::calculateSize(new \OC\Files\View('/'.$user.'/files_trashbin/files/'.$file));
-               } else {
-                       $size += $view->filesize('/files_trashbin/files/'.$file);
                }
-               $view->unlink('/files_trashbin/files/'.$file);
-               $trashbinSize -= $size;
-               self::setTrashbinSize($user, $trashbinSize);
-               
+
                return $size;
        }
 
@@ -306,17 +573,17 @@ class Trashbin {
         * @param $timestamp of deletion time
         * @return true if file exists, otherwise false
         */
-       public static function file_exists($filename, $timestamp=null) {
+       public static function file_exists($filename, $timestamp = null) {
                $user = \OCP\User::getUser();
-               $view = new \OC\Files\View('/'.$user);
+               $view = new \OC\Files\View('/' . $user);
 
                if ($timestamp) {
-                       $filename = $filename.'.d'.$timestamp;
+                       $filename = $filename . '.d' . $timestamp;
                } else {
                        $filename = $filename;
                }
 
-               $target = \OC\Files\Filesystem::normalizePath('files_trashbin/files/'.$filename);
+               $target = \OC\Files\Filesystem::normalizePath('files_trashbin/files/' . $filename);
                return $view->file_exists($target);
        }
 
@@ -346,11 +613,11 @@ class Trashbin {
                $softQuota = true;
                $user = \OCP\User::getUser();
                $quota = \OC_Preferences::getValue($user, 'files', 'quota');
-               $view = new \OC\Files\View('/'.$user);
-               if ( $quota === null || $quota === 'default') {
+               $view = new \OC\Files\View('/' . $user);
+               if ($quota === null || $quota === 'default') {
                        $quota = \OC_Appconfig::getValue('files', 'default_quota');
                }
-               if ( $quota === null || $quota === 'none' ) {
+               if ($quota === null || $quota === 'none') {
                        $quota = \OC\Files\Filesystem::free_space('/');
                        $softQuota = false;
                } else {
@@ -361,11 +628,11 @@ class Trashbin {
                // subtract size of files and current trash bin size from quota
                if ($softQuota) {
                        $rootInfo = $view->getFileInfo('/files/');
-                       $free = $quota-$rootInfo['size']; // remaining free space for user
-                       if ( $free > 0 ) {
+                       $free = $quota - $rootInfo['size']; // remaining free space for user
+                       if ($free > 0) {
                                $availableSpace = ($free * self::DEFAULTMAXSIZE / 100) - $trashbinSize; // how much space can be used for versions
                        } else {
-                               $availableSpace = $free-$trashbinSize;
+                               $availableSpace = $free - $trashbinSize;
                        }
                } else {
                        $availableSpace = $quota;
@@ -381,43 +648,40 @@ class Trashbin {
        private static function expire($trashbinSize) {
 
                $user = \OCP\User::getUser();
-               $view = new \OC\Files\View('/'.$user);
+               $view = new \OC\Files\View('/' . $user);
                $availableSpace = self::calculateFreeSpace($trashbinSize);
                $size = 0;
 
                $query = \OC_DB::prepare('SELECT `location`,`type`,`id`,`timestamp` FROM `*PREFIX*files_trash` WHERE `user`=?');
                $result = $query->execute(array($user))->fetchAll();
 
-               $retention_obligation = \OC_Config::getValue('trashbin_retention_obligation',
-                       self::DEFAULT_RETENTION_OBLIGATION);
+               $retention_obligation = \OC_Config::getValue('trashbin_retention_obligation', self::DEFAULT_RETENTION_OBLIGATION);
 
                $limit = time() - ($retention_obligation * 86400);
 
-               foreach ( $result as $r ) {
+               foreach ($result as $r) {
                        $timestamp = $r['timestamp'];
                        $filename = $r['id'];
-                       if ( $r['timestamp'] < $limit ) {
+                       if ($r['timestamp'] < $limit) {
                                $size += self::delete($filename, $timestamp);
-                               \OC_Log::write('files_trashbin', 'remove "'.$filename.'" fom trash bin because it is older than '.$retention_obligation, \OC_log::INFO);
+                               \OC_Log::write('files_trashbin', 'remove "' . $filename . '" fom trash bin because it is older than ' . $retention_obligation, \OC_log::INFO);
                        }
                }
                $availableSpace = $availableSpace + $size;
                // if size limit for trash bin reached, delete oldest files in trash bin
                if ($availableSpace < 0) {
                        $query = \OC_DB::prepare('SELECT `location`,`type`,`id`,`timestamp` FROM `*PREFIX*files_trash`'
-                               .' WHERE `user`=? ORDER BY `timestamp` ASC');
+                                       . ' WHERE `user`=? ORDER BY `timestamp` ASC');
                        $result = $query->execute(array($user))->fetchAll();
                        $length = count($result);
                        $i = 0;
-                       while ( $i < $length &&   $availableSpace < 0 ) {
+                       while ($i < $length && $availableSpace < 0) {
                                $tmp = self::delete($result[$i]['id'], $result[$i]['timestamp']);
-                               \OC_Log::write('files_trashbin', 'remove "'.$result[$i]['id'].'" ('.$tmp.'B) to meet the limit of trash bin size (50% of available quota)', \OC_log::INFO);
+                               \OC_Log::write('files_trashbin', 'remove "' . $result[$i]['id'] . '" (' . $tmp . 'B) to meet the limit of trash bin size (50% of available quota)', \OC_log::INFO);
                                $availableSpace += $tmp;
                                $size += $tmp;
                                $i++;
                        }
-
-
                }
 
                return $size;
@@ -430,25 +694,25 @@ class Trashbin {
         * @param $destination destination path relative to the users root directoy
         * @param $view file view for the users root directory
         */
-       private static function copy_recursive( $source, $destination, $view ) {
+       private static function copy_recursive($source, $destination, $view) {
                $size = 0;
-               if ( $view->is_dir( 'files'.$source ) ) {
-                       $view->mkdir( $destination );
-                       $view->touch($destination,  $view->filemtime('files'.$source));
-                       foreach ( \OC_Files::getDirectoryContent($source) as $i ) {
-                               $pathDir = $source.'/'.$i['name'];
-                               if ( $view->is_dir('files'.$pathDir) ) {
-                                       $size += self::copy_recursive($pathDir, $destination.'/'.$i['name'], $view);
+               if ($view->is_dir('files' . $source)) {
+                       $view->mkdir($destination);
+                       $view->touch($destination, $view->filemtime('files' . $source));
+                       foreach (\OC_Files::getDirectoryContent($source) as $i) {
+                               $pathDir = $source . '/' . $i['name'];
+                               if ($view->is_dir('files' . $pathDir)) {
+                                       $size += self::copy_recursive($pathDir, $destination . '/' . $i['name'], $view);
                                } else {
-                                       $size += $view->filesize('files'.$pathDir);
-                                       $view->copy( 'files'.$pathDir, $destination . '/' . $i['name'] );
-                                       $view->touch($destination . '/' . $i['name'], $view->filemtime('files'.$pathDir));
+                                       $size += $view->filesize('files' . $pathDir);
+                                       $view->copy('files' . $pathDir, $destination . '/' . $i['name']);
+                                       $view->touch($destination . '/' . $i['name'], $view->filemtime('files' . $pathDir));
                                }
                        }
                } else {
-                       $size += $view->filesize('files'.$source);
-                       $view->copy( 'files'.$source, $destination );
-                       $view->touch($destination, $view->filemtime('files'.$source));
+                       $size += $view->filesize('files' . $source);
+                       $view->copy('files' . $source, $destination);
+                       $view->touch($destination, $view->filemtime('files' . $source));
                }
                return $size;
        }
@@ -459,24 +723,24 @@ class Trashbin {
         * @param $timestamp timestamp when the file was deleted
         */
        private static function getVersionsFromTrash($filename, $timestamp) {
-               $view = new \OC\Files\View('/'.\OCP\User::getUser().'/files_trashbin/versions');
+               $view = new \OC\Files\View('/' . \OCP\User::getUser() . '/files_trashbin/versions');
                $versionsName = $view->getLocalFile($filename);
                $versions = array();
-               if ($timestamp ) {
+               if ($timestamp) {
                        // fetch for old versions
-                       $matches = glob( $versionsName.'.v*.d'.$timestamp );
-                       $offset = -strlen($timestamp)-2;
+                       $matches = glob($versionsName . '.v*.d' . $timestamp);
+                       $offset = -strlen($timestamp) - 2;
                } else {
-                       $matches = glob( $versionsName.'.v*' );
+                       $matches = glob($versionsName . '.v*');
                }
 
-               foreach( $matches as $ma ) {
-                       if ( $timestamp ) {
-                               $parts = explode( '.v', substr($ma, 0, $offset) );
-                               $versions[] = ( end( $parts ) );
+               foreach ($matches as $ma) {
+                       if ($timestamp) {
+                               $parts = explode('.v', substr($ma, 0, $offset));
+                               $versions[] = ( end($parts) );
                        } else {
-                               $parts = explode( '.v', $ma );
-                               $versions[] = ( end( $parts ) );
+                               $parts = explode('.v', $ma);
+                               $versions[] = ( end($parts) );
                        }
                }
                return $versions;
@@ -491,12 +755,12 @@ class Trashbin {
         */
        private static function getUniqueExtension($location, $filename, $view) {
                $ext = '';
-               if ( $view->file_exists('files'.$location.'/'.$filename) ) {
+               if ($view->file_exists('files' . $location . '/' . $filename)) {
                        $tmpext = '.restored';
                        $ext = $tmpext;
                        $i = 1;
-                       while ( $view->file_exists('files'.$location.'/'.$filename.$ext) ) {
-                               $ext = $tmpext.$i;
+                       while ($view->file_exists('files' . $location . '/' . $filename . $ext)) {
+                               $ext = $tmpext . $i;
                                $i++;
                        }
                }
@@ -509,17 +773,16 @@ class Trashbin {
         * @return size of the folder
         */
        private static function calculateSize($view) {
-               $root = \OCP\Config::getSystemValue('datadirectory').$view->getAbsolutePath('');
+               $root = \OCP\Config::getSystemValue('datadirectory') . $view->getAbsolutePath('');
                if (!file_exists($root)) {
                        return 0;
                }
-               $iterator = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($root),
-                       \RecursiveIteratorIterator::CHILD_FIRST);
+               $iterator = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($root), \RecursiveIteratorIterator::CHILD_FIRST);
                $size = 0;
 
                foreach ($iterator as $path) {
-                       $relpath = substr($path, strlen($root)-1);
-                       if ( !$view->is_dir($relpath) ) {
+                       $relpath = substr($path, strlen($root) - 1);
+                       if (!$view->is_dir($relpath)) {
                                $size += $view->filesize($relpath);
                        }
                }
@@ -541,7 +804,7 @@ class Trashbin {
                }
                return false;
        }
-       
+
        /**
         * write to the database how much space is in use for the trash bin
         *
@@ -549,12 +812,22 @@ class Trashbin {
         * @param $size size of the trash bin
         */
        private static function setTrashbinSize($user, $size) {
-               if ( self::getTrashbinSize($user) === false) {
+               if (self::getTrashbinSize($user) === false) {
                        $query = \OC_DB::prepare('INSERT INTO `*PREFIX*files_trashsize` (`size`, `user`) VALUES (?, ?)');
-               }else {
+               } else {
                        $query = \OC_DB::prepare('UPDATE `*PREFIX*files_trashsize` SET `size`=? WHERE `user`=?');
                }
                $query->execute(array($size, $user));
        }
-       
+
+       /**
+        * register hooks
+        */
+       public static function registerHooks() {
+               //Listen to delete file signal
+               \OCP\Util::connectHook('OC_Filesystem', 'delete', "OCA\Files_Trashbin\Hooks", "remove_hook");
+               //Listen to delete user signal
+               \OCP\Util::connectHook('OC_User', 'pre_deleteUser', "OCA\Files_Trashbin\Hooks", "deleteUser_hook");
+       }
+
 }